Chapter 2 Chemistry Flashcards
Anything that has mass and occupies space
Matter
3 states of matter
Solid, liquid & gas
Capacity to do work or put matter into motion
Energy
Energy in action
Kinetic energy
Stored energy
Potential energy
Substances that cannot be broken down into simpler substances by ordinary chemical methods
Elements
4 elements that make up 96% of the body
Carbon, hydrogen, oxygen, nitrogen
Alter in bonds of chemical substances
Chemical energy
Results from movement of charger particles
Electrical energy
Directly involved in moving matter
Mechanical energy
Travels in waves
Radiant or electromagnetic energy
What makes up the atomic nucleus?
Protons and neutrons
amu
Atomic mass unit
Atoms like to fill their valance shell
Octet rule
One or two letter chemical shorthand for each element
Atomic symbol
Positive
Protons
Neutral
Neutrons
Negative
Electrons
What do protons attract?
Electrons
The sun of the protons and neutrons
Mass number
What is a of atom that has same protons and electrons but different number of electrons?
Isotope
What is an average of the weights of all the isotopes of an element?
Atomic weight
What are isotopes that decompose to more table forms?
Radioisotopes
What is a substance composed of two or more different elements, the atoms of which are chemically united?
Compound
What is the number of miles of solute per liter or solvent? (Also known as avogadro’s number)
Molarity
A mixture in which the solute particles are not evenly distributed throughout the mixture.
Ex: jello (sol-gel)
Colloid
Mixtures that contain large, visible solutes that do not settle out
Ex: water & sand
Suspensions
Energy relationships
Chemical bonds
This shell holds 2 electrons
Shell 1
These shells hold a max of 8 electrons
Shells 2 & 3
The outermost shell is also called what?
Valence shell
What ions are aroma that have gained or lost electrons and become charged?
Ionic bonds
An atom that gained one or more electrons.
Anion
An atom that lost one or more electrons
Cation
Sharing of electrons
Covalent bonding
Unequal sharing
Polar
Equal sharing
Nonpolar